Who called from 5705911112

I got three calls from this number today.  Nobody on the line.  I tried calling it back after the third call and the phone just clicked, it did not even ring.  STrange

I tried to call the number back.  I got an answering service, that says a representative will be with you momentarily.  Then it disconnects you.

These people have been calling my father every day on and off all day for the past 3 weeks. We call the number back and get a message stating, "your call is very important to us, please hold for the next available representative", there's music and the line disconnects. I was able to find it is related to dialstop.com in Scranton, PA.

Receive up to ten calls a day from this number. No message. Disconnects when answered.

I get 10 or more calls from them a day? Im at work -they do not leave a message !